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Groups > linux.kernel > #1229388
| From | Tomeu Vizoso <tomeu.vizoso@collabora.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH v6 18/22] dma: of: Probe DMA controllers on demand |
| Date | 2015-09-21 16:10 +0200 |
| Message-ID | <qb9X4-rF-23@gated-at.bofh.it> (permalink) |
| References | <qb9X3-rF-9@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
When looking up a DMA controller through its OF node, probe it if it hasn't already. The goal is to reduce deferred probes to a minimum, as it makes it very cumbersome to find out why a device failed to probe, and can introduce very big delays in when a critical device is probed. Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com> --- drivers/dma/of-dma.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/dma/of-dma.c b/drivers/dma/of-dma.c index 1e1f2986eba8..e899832f7df3 100644 --- a/drivers/dma/of-dma.c +++ b/drivers/dma/of-dma.c @@ -16,6 +16,7 @@ #include <linux/mutex.h> #include <linux/slab.h> #include <linux/of.h> +#include <linux/of_device.h> #include <linux/of_dma.h> static LIST_HEAD(of_dma_list); @@ -263,6 +264,8 @@ struct dma_chan *of_dma_request_slave_channel(struct device_node *np, if (of_dma_match_channel(np, name, i, &dma_spec)) continue; + of_device_probe(dma_spec.np); + mutex_lock(&of_dma_lock); ofdma = of_dma_find_controller(&dma_spec); -- 2.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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[PATCH v6 18/22] dma: of: Probe DMA controllers on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-21 16:10 +0200
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